with most areas receiving between 8 and 12 inches ( 200 and 300 mm ) annually . much of the annual precipitation occurs between the beginning of march and the end of june . most of the rest falls as snow during the fall and winter months . snow ##pack at elevations below 6 @ , @ 000 feet ( 1 @ , @ 800 m ) usually melt ##s by april ; however , at the higher elevations , snow can remain until mid @ - @ june . local flooding often occurs in the spring as the snow ##pack melt ##s . the prevailing winds are from the west @ - @ southwest , and they are normally strongest in march and april . brief ,
with most areas receiving between 8 and 12 inches ( 200 and 300 mm ) annually. much of the annual precipitation occurs between the beginning of march and the end of june. most of the rest falls as snow during the fall and winter months. snowpack at elevations below 6 @, @ 000 feet ( 1 @, @ 800 m ) usually melts by april ; however, at the higher elevations, snow can remain until mid @ - @ june. local flooding often occurs in the spring as the snowpack melts. the prevailing winds are from the west @ - @ southwest, and they are normally strongest in march and april. brief,